Die lapping and grinding machine



Nov.l l, 1932. a. BSTEH um LAPPI'NG v.Arm emma MACHINE Filed ou. s1, 1929 2 sheets-sheet 1 Nov. l', 1932.

R. BSTEH DIE L'APPI'NG AND @BINDING MACHINE Filed om,l s1. 1929 2 sheets-sheety 2 Ts N ,m E# f V1@ A ww@ Patented Nov. l, 1932 i I i l ,UNITED STATES PATENT OFFICE:J4

RUDOLF BSTEH, OF VIENNA, AUSTRIA DIE LAPPING AND enmmndmoirmn Application led October 31, 1929, Serial No. 403,762, and in Austria October 11, 1929.

This invention relates to improvements in plates 7 and 8, which are provided with webs die lapping and grinding machines of the 7a and 8, furnished with journal bearings kind in which the lapping or grinding tool 7h and 8b for securing the clamping jaw holdconsists of a wire, for instanceof copper covers 10 and 1l. Each holder 10, 11 is rotat- 5 ered with an abrasive powder such as carably secured by means of a pin 10 and 11lL 5.', borundurn or diamond powder, a certain respectively in the corresponding journal length of which is clamped in two clamping bearing 7b and 8b and, as shown in Fig. 4, jaws carried by a reciprocating frame and is is provided with a clamping plate 10b and drawn through the opening of the die to be 11b respectively, furnished with holes 13. By

l0 ground, polished or re-polished, said latter means of wing screws 19, clamping plates being Secured to a rotating die-holder, 17 and 18 are forced towards the clamping The essential feature of the present invenplates 10b and l1b respectively for clamping tion consists in the provision of animmovathe polishing wire w. A graduation G prog ble support above the operating or driving vided at the top side of the clamping plates l casing, the said support serving as slide for 10" and 1.1", serves for adjusting the position G5 guiding the reciprocating frame carrying the of the Wlle w in the Clamplllg Jaws 17, 10b clamped portion of the polishing wire. and 18, 11", the screw threaded holes 13 being One mode of carrying out the presenti inused for the reception of a plurality of wing vention is illustrated by way of example on screws 19. The bottom holder 11 is pro- "9 the 'accompanying sheets of drawings in vided With a. bOIe 11 fOr the free passage 70 whichof an operating shaft 20, while the up r Figs 1 and 2 show the machineA infront holder 10 is'furnished with asquare threa ed view and side vview respectively and partly bore 10,wh 1ch 1s engaged byasquare threadv in Section, er top portion 20'L of the shaft 20. Thereby "JJ 3 is 9, plan View 0f the machine, the the enf/1.1% frame 5, 6, 7, 8 1S Operatively COU.- 75 clamping jaws and the die holder being not pled Wlth the Shall". 20' The latter Passes Shown for the Sake 0f clearness through the upper part of the casing 1 and 4 a Sectional View 0f the machine, at l'tS bttOIIl end. 1S pIOVlded a. fOOt 21, the section being taken on line a-b of Fig. 2. ,VYlllCll 1S Seo/Il led by a SCIeW 22- O11 both 5 is a, sectional View of the machule, -SldS, the .CaSlIlg 1.1S ClOSed. lldS 25 aLl/1d 8o the section being taken on liner-dof Fig. 1. 26 TeSpeotlVely, Wllloh are ploVlded Wlllly i11- Figs. 6 and 7 illustrate the die holder with ner bosses 25a and 26a. The lettera/r Pfothe die to be treated in longitudinal section Vlded Wl'tll holes 27, 28 for the reception of and plan View respectively, the beallng plIlS 30a, 30h 0f 3.11 eCCeIltIC 30, 5 Figs. 8, 9 and 10 show different formsrof Coupled Wlth e toothed Wl1,l"32 by means B5 Standard dies which may be Suitab p01- of'a p 1n 31. This toothed wheel meshes with ished or ground with the machine'a/cording a 13111011.33, .mounted on eifelmft 34, Which S to the present invention, .f located 1n a boss 1a ofthe casing (Fig. 5) n In Figs, 1 31nd 2, 1 designates the casing and 1n a sleeve 35. The end 34 of this shaft for the driving gear of the machine. Two 34 Carries a Tope Pulley 37- The Sleeve 35 posts 2 `and 3 ,are arranged 0n the Casing 1 1S f'lXed 1D. a. CvOlIeSpOIldlIlg Opening Of the and at the upper end are Stayed by a, Stay ca slng 1 by means of a stud 38. The casing plate. 4. The saidposts also serve as vertical 1 1S prOVided with an oil inlet 40 and an oil .y guides of the reciprocating frame carrying outlet 41, which is closed by a screw. The the clamped portion of the Wire and as carl shaft 20 and thus also the reciprocating frame nrier or support ofthe die holder. The re- 5, 6, 8, guidedby the posts or pillars 2 and ciprocating frame consists of two' vertical 3, are raised yduring each revolution of the bars 5 and 6, which at their ends are stayed eccentric 30 and again forced down by their by, two stay plates 7 and 8. The posts .2` own weight. By means ofa collar 43, a Vand 3 pass through recesses of said stay] ratchet whee144 provided witha handle 45 10 shifted downward with `tion of the said is fixed at the upper end of the shaft 20 and is provided with ratchet teeth 46, which Aare engaged by .a pawl 48 integral with a rocking lever 47. The latter is rotatably arranged on a shaft screwed into the head 49, Iwhich is secured on a post 50. This ost is screwed at 51 into the stay plate 4. n en'- gaging lever 52 is furnished with a handle 52a (Fig. 4) the hook-shaped end 52b of which normally engages the upper end of the shaft 20. his position is illustrated in Figs. 1 and 2. The engaging lever 52 is secured in this position by a spring 56, which is provided with a locking member 55-and fixed by a screw 57 to the sta plate 4. During every lift, the shaft 20 is s ightly rotated by means of the lever 47 adapted to be turned in the direction of the arrow p, (Fig. 2) because the pawl 48 is then engaged in a tooth 46 of the ratchet 44. In view of the square threaded part 20al of the shaft 20, the entire clamping frame of the polishing-wire "w is slightly respect to the posts 2, 3. In the position shown in Fi s. 1 and 2 in whichthe lever 52 engages t e upper end of the shaft 20 during the lift of the' clamping frame, the said relative movement will cause a slight feed of the polishing wire, the extent of which depends on the height of the lift of the shaft 20.

The die to be treated for instance a drawdie or spinning nozzle made of diamond, synthetic stone or steel (Figs. 8, 9 and l10), and provided with a cylindrical bore indicated by the dotted lines gis first clamped in its holder, which consists of a sleeve 61 (Fig. 6) with a cylindric bore 61, a cone-shaped clamping part 61", a c lindric extension 61 and a counter-head 62 in the shape of a ropepulle The two parts 61 and 62 are screwed toget er 0n both sides of a ring 67, balls 64 and 65 being interposed to permita free rataparts 61, 62, which together with the rin l67 forms ball-races. The ring 67 is screwe into an.- annular holder 69, carried by a fork 71, 72, 72, between the arms 71 of which is provided an o ening 70 for the passage of the shaft 20. e in 72 of the fork is inserted in a clamping p ate 73, adapted to be f ixed in any desired vertical position to the pillars 2 and 3, and tightened by a handle 74 which rests on a washer 75. This arrangement permits also an inclined adjustment of the whole die holder inthe way shown by way of example in Fig. 1. The die 60 1s clamped down onto the cone-shaped part 61b of the part 61 of the tool head by means of a screw-cap 77, provided with a suitable open ing. Therebythe die is automatically' set or centered. The die holder is rotated at 'a high speed b the agency of a. rope78, passing round t e pulley 62 and operated by a suitable source of power for instance 'by an electric motor. l@Vheii the eccentric 30 rotates, the whole frame, consisting of the members vertical frame and 5, 6, 7 and 8 is reci rocated with the clamped wire fw, whereby t e latter rubs and grinds latter is shaped as shown in Figs. 8, 9 or 10,

the shape or profile dependin on the adjustable position of the points o attachment of the wire on thetwo clamping devices 10, 11, and on the angular position of the die holder with respect to the vertical.

It must be noticed that setting the die holder in different angular positions makes it possible to grind and polish simultaneously the inlet, the bearing and the outlet of a large variety of die profiles'.

I claim:

1. Die lapping and grinding machine of the type using a wire as carrier for an abrasive powder, including the combination', with a gear casing, of a gear associated with an eccentric and a toothed wheel rotatably coupled with said eccentric and a pinion meshing with said toothed wheel, a vertical fixed frame consisting of two pillars connected by means of a tensioning plate and .xed on said gear casing, a reciprocating wire clamping frame having spaced posts and `clamping Vplates screwed together slidably mounted on said rovidedy with a. verticiasY shaft journaled on t ie' vertical frame and becon led with said eccentric and a pinion mes ing with said toothed wheel, a vertical xed frame consisting of two pillars ccifiii/iect:V ed by means of a tensioning plate and r en said gear casing, a reciprocating clamping frame having spaced pests and clamping plates screwed together slidabiy mounted on said vertical frame and` provided with a vertical shaft having a emecth bottom portion and a square threaded upper portion and both journaled on the vert fra me and movable up and down thereon said eccentric, jaws disposed en the inter ediate portions of said clamping plates for clamping' the wire, a rotating die beider mounted on' said fixed frame and means for adjusting the height and the angular position of the latter en the pillars.

3. Die iapping and grinding machine of the type using a wire as carrier for an abrasive powder,inciuding the combination, with vbottom portion and a square threaded upper portion and both journaled on the vertical frame and movable upA and down thereon by said eccentric, a square thread on one of said clamping plates of the reciprocating frame engaging the said squarev threaded upper por- `tion of said vertical shaft, jaws disposed on the intermediate portionsofsaid clamping plates for clamping the wire, a rotating die holder mounted on said fixed frame and means for adjusting the height and the angular position of the latter on the pillars.

4. Die lapping and grinding machine of the type using a wire 'as carrier for Ianabrasive powder, including the combination, with a gear casing, of a gear associated with an eccentric and a toothed wheel rotatably coupled with said eccentric and a pinion meshing with said toothed wheel, a vertical fixed frame consisting of two pillars connected by means of a'tensioning plate and fixed on said gear. casing, a reciprocating wire clamping frame having spaced posts and v clamping plates screwed together slidably mounted on said vertical frame-and provided with a vertical shaft having a smooth bottom portion and a square 'threaded upper portion, and both journaled on the vertical frame and movable up and down by said eccentric, a

square thread on one of ,said clamping plates of t-he reciprocating frame engaging the said square threaded upper portion .of said vertical shaft, atoothed ratchet wheel secured to the upper end ofV said shaft beyond the threaded portion thereof, jaws disposed on the intermediate portions of said clamping plates for clamping the wire, a rotating die i the type a gear casing,

holder' mounted on said fixed frame and means for adjusting the height and the angular position of the latter.

5. Die lapping and grinding machine of using a wire as carrier for an abrasive powder, including the combination, with of l-a gear associated with an eccentric and a toothed wheel rotatably coupled with saideccentric andapinion meshing with said toothed wheel, a vertical lfixed frame consisting of two pillars connected by means of a tensioning plate and fixed on said gear casing, a reciprocating wire clamping frame having spaced postsand clamping plates screwed together slidably mounted on said vertical frame and provided with a vertical shaft which is provided with a vthreaded upper smooth lower part freely passing through one of the clamping plates of the reciprocating frame, also provided with a square ortion and both journaled on the verticalf rame and movable up and down by said eccentrics, a square thread on the other clampingvplate of said reciprocating frame engagin the said square threaded upper portion o said vertical shaft, a ratchet wheel provided with teeth and secured to the upper end of said shaft beyond the threaded portion'thereof, jaws disposed on the intermediate portion. of said clamping plates for clamping the wire, a rotating die holder mounted on said fixed frame and means'for adjusting thehcight and the angular position of the latter on the pillars.

6. Die lapping and grinding machine ,of the type using a wire las carrier for an abrasive powder, including the combination, with a gear casing, of a gear associated with an eccentric and a toothed wheel rotatably coupled with said eccentric and a pinion meshing with said toothed wheel, a lvertical fixed frame consisting of two pillars connected by means of a tensioning plate which is provided with a post having in turn a supporting member projecting therefrom, said post being fixed on said gear casing, a feed lever integral with a pawl secured to said projecting supporting member, a reciprocating wire clamping clamping plates screwed together slidably mounted on said vertical frame and provided with a vertical shaft which is provided with a smooth lower part freely passing,

through one of the clamping plates of the reciprocating frame, also provided with a square threaded upper portion and b oth journaled on the vertical frame and movable up thread on the other clamping plate of said reciprocating frame engaging the said square threaded upper portion of said vertical shaft, a ratchet wheel provided with teeth and secured to the upper end of lsaid shaft beyond the threaded portion thereof, jaws disposed on the intermediate portion of said clamping plates for clamping the wire, a rotating die holder mounted on said fixe frame and means for adjusting the height and the angular position of the latter on the pillars;

7. Die lapping and grinding machine of the type using a wire as carrier for an abrasive powder, Aincluding the combination, with a gear casing, of a gear associated with Aan eccentric and a toothed wheel rotatably coupled with said eccentric and a pinion meshing with said toothed wheel, a vertical xed frame consistin means of a tensloning plate which is provided with a post having in turn a supporting member projecting therefrom, said post being fixed -on said gear casing, a feed lever frame havi'ng vspaced posts and and down by said eccentrics, a square of two plllars connected by j integral with a pawl secured to said projectclamping frame having spaced posts andclamping plates screwed together slidably i mounted on said .vertical frame and'providthrough oneI of the clamping plates of the reciprocating frame, also provided with a square threaded upper portion and both journaled on the vertical frame and movable up and down by said eccentrics, a square thread on the otherl clamping plate of said reciprocating frame engaging the said square threaded upper portion of said vertical shaft, a ratchet wheel provided with teeth on its upper face and secured to the upper end of said shaft beyond the threaded portion thereof, jaws disposed on the intermediate portion of said clamping plates for clamping the wire, a rotating die holder mounted on said fixed frame and means for adjustingl theheight and the angular position of the latter on the pillars, said feed lever and pawl engaging said ratchet wheel and rotating said vertical shaft during each of its upward strokes.

8. Die lapping and grinding machine of the type using a wire as carrier for anabrasive powder, including the combination, with a gear casing, of a gear associated with an eccentric and a toothed wheel rotatably coupled with said eccentric and a pinion meshing with said 'toothed wheel, a `vertical Y fixed frame consisting of two pillars connected by means of a tensioning plate which is provided with a post having in turna supporting member projecting therefrom, said post being fixed on said gear casing, a feed lever integral withV a pawl secured to said projecting supporting member, a reciprocating wire clamping frame having spaced posts and clamping plates screwed together slidably mounted on said vertical frame and provided with a vertical shaft which is provided with a smooth lower part freely passing through one of the clamping plates of the reciprocating frame, square threaded upper portion and both journaled on the vertical frame and movable up and down by said eccentrics, a square thread on the other 'clamping plate of said reciprocating frame engaging the said s uare threaded upper portionof said vertical s aft, a ratchet upper face, and secured to the upper end of /s'aid shaft beyond the threaded, portion thereof, said feed lever and pawl engagin said ratchet wheel and rotatin said shaft uring each of its upward stro holder mounted on said fixed frame, means for adjusting the'height and the angular position of the latter on the pillars, and jaws `which are disposed Ition of said clampingplatesv for clamping ing supporting member, a reciprocating wire;

also provided with ak wheel provided with teeth on itses, a rotating die on the intermediate porthe wire and consisting of a middle part, a

a plate-shaped head portion, an outer clamping plate and manually adjustable screws for screwing the latter towards said head portions.

9. Die lapping and grinding machine of the type using a wire as carrier for an abrasive powder, including the combination, with a gear casing, of a ear associated with an eccentric 'and a toot ed wheel rotatably coupled with said eccentric and a pinion meshing with said toothed wheel, a vertical fixed frame consisting oftwo pillars connected by means of a tensioning plate which is provided with a post having in turn a supporting member projecting therefrom, said post being fixed on said gear casing, a feed lever integral with a pawl secured to said projecting supporting member, a reciprocating wire clamping frame having spaced posts and clamping plates screwed together slidably mounted on said vertical frame and provided with a vertical shaft which is provided with a smooth lower part freely passing through one of the clamping plates of the reciprocatingI frame, also provided with a square threaded upper portion and both journaled on the vertical frame and movable up and down by said Veccentrics, a square thread von the other clamping plate of said reciprocating frame engaging the said s uare threaded upper portion of said vertical s aft, aratchet wheel provided with teeth and secured to the upper end of said shaft beyond the threaded portion thereof, jaws which are disposed on the intermediate portions of said clamping plates for clamping the wirevand consistin of a middle part, a in for attachment to t e clamping plateau aplate-shaped head portion, an outer clamping late and winged screws for screwing the latter towards said head portions, a rotating die holder, a ring on the latter, a bolt provided with a plate, and arms connecting the ring with sal plate for adjusting the die holder on the p1 ars. v f

10. Die lapping .and grinding machine of the type using a wire as carrier for an abrasive powder, including the combination, with a gear casing, of a gear associated with an eccentric and a toothed wheel rotatably coupled with said eccentric andy a pinion meshing with said toothed' wheel, a vertical lixed frame consisting of two pillars connected by means of a tensioning plate which is provided with a post having in turn a supporting member projecting therefrom, said post `being fixed on'said gear casing, a-feed lever irtegral with a pawl secured to said projecting supportingI member, a reciprocating wire clamping frame having spaced posts and clamping plates screwed together slidabl mounted on said vertical frame and provid; ed with a vertical shaft whichis provided pm for attachment to the clamping plate and with a smoothlower part' freely passing through one of the clamping plates of the reciprocating frame, also provided with a l square threaded upper portion and both journaled on the vertical frame and movable up and down bysaid eccentrics, a square thread on the other clamping plates of said recipro` cat-ing frame engaging the said square threaded upper .portion of said vertical shaft, a ratchet wheel provided with teeth and secured to the upper end of said shaft beyond the threaded portion thereof, jaws whichl are disposed on the intermediate portions of said clamping plates for the clamping of the wire v and consisting of a middle part, a pin for attachment to the clamping plate and a plateshaped head portion, an outer clamping plate and winged screws for screwing the latter towards said head portions, a rotating die holder consisting of an upper main part, and an auxiliary part screwed to the latter, a ring, a bolt provided with ai plate,aiid arms connecting the ring with said plate for adm) Qing with said toothed wheel, avertical fixed frame consisting of two pillars connected by means of a tensioning plate which is provided with a post having in turn a supporting member projecting therefrom, said post be-V ing fixed on said gear casing, a feed lever integral with a pawl secured to said projecting supporting member, a reciprocating wire clamping frame having spaced posts and clamping plates screwed together slidably mounted on said vertical frame and providfed with a vertical shaft which is provided with a smooth lower part. freely passing through one of the clamping plates of the reciprocating frame, also provided with a square threaded upper portion and both journaledon the vertical frame and movable up l and down by said eccentrics, a square thread 'on the other clamping plate of said reciprocating frame engaging t-he said square threaded upper portion of said verticalshaft, a ratchet wheel provided with teeth and secured to the upper end of said shaftbeyond the threaded portion thereof, jaws which are disposed on the'intermediate portions of said c clamping plates for the clamping of the wire,

` holder including an upper main member, an l and consisting of a middle part, a .pin for attachment to the clamping plate and a plateshaped head portion, an outer clamping plate and winged screws for screwing the latter t0- wards said head portions, a rotating die intermediate portion with a conically shaped interior, and an upper cylinder having an outer screw thread disposed close. to said .in-

termediate portion, and an auxiliary part screwed to said main member, a ring, a. olt

rovided with a plate, and a screw securing the bolt to aforesaid pillars for adjusting the height and the angular position of the rotating die holder on said pillars.

12. Die lapping and grinding machine of the type using a Wire as carrier for an abrasive powder, including the combination, with a gear casing, of a gear associated with an eccentric and a toothed wheel rotatably coupled with said eccentric and a piniony meshing with said toothed wheel, a vertical fixed frame consisting of two pillars connected by means of a tensioning plate which is provided with a post having in turn a supporting member projecting therefrom, said post being fixed on said gear-casing, a feed lever integral with a pawl secured to said projecting supporting member, a reciprocating ,wire clamping frame having spaced posts and clamping plates screwed together slidably eating frame engaging the said square threaded upper portion of said vertical shaft, a ratchet wheel provided with teeth and secured to the upper end of said shaft beyond the threaded portion thereof, jaws which are disposed on the intermediate portions of s aid clamping platesfor the clamping of the wire, and consisting of a middle part, a pinfor attachment to the clamping plate and a platelshaped head portion, an outer clamping plate and winged screws for screwing the latter towards said head portions, a rotating die holder including an upper mainmember consisting of a bottom cylinder having an outer screw thread, an intermediate portion with a conically shaped interior, and an upper cylinder having an outer screw thread disposed close to said intermediate portion, a cap for self-centering of thedie screwed to said upper cylinder and an auxiliary part screwe to said upper main member, a ring, an auxiliary ring screwed into the latter, balls for loeating the main part and the auxiliary part on said auxiliary ring, a bolt provided with a plate, arms connecting the ring with said and a screw securing the bolt to aforesaid pillars.

In testimony whereof I aiix my signaturev RUDOLF BSTEH. 

